Paper Title:
Z-Parameter Method for Life Prediction in Low Carbon Steels
  Abstract

In this paper, a Z-parameter method is proposed to relate creep rupture data and microstructure deterioration of three low carbon steels: Cr5Mo, 12Cr1MoV and 20 steels. A new analytic expression of the Larson-Miller parameter verse stress is supposed as: P =Z + C1 lgσ + C2 σ, where C1 and C2 are constants which determine the shape of the curves and related to materials, and the value of parameter Z represents the magnitude deviated from the master curve which corresponds with the deterioration in rupture properties. As the deterioration in rupture properties closely connects with the degradation of microstructure, namely the spheroidization of carbides in pearlite style steel, a linear relationships have been found between the value of Z-parameter and the level of spheroidization E which can be expressed as: Z = a1 + a2 E.

  Info
Periodical
Key Engineering Materials (Volumes 297-300)
Edited by
Young-Jin Kim, Dong-Ho Bae and Yun-Jae Kim
Pages
1758-1763
DOI
10.4028/www.scientific.net/KEM.297-300.1758
Citation
S. Q. Han, J. Zhao, L. Wang, H. B. Gao, "Z-Parameter Method for Life Prediction in Low Carbon Steels ", Key Engineering Materials, Vols. 297-300, pp. 1758-1763, 2005
Online since
November 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Y.K. Chung, Jong Jin Park, Cheol Hong Joo, Ik Min Park
Abstract:X20CrMoV12 1 steels were exposed at three different high temperatures and various durations. Aging parameter, LMP s, was used to...
537
Authors: Yong Jiang, Jian Ming Gong, Shan Tung Tu
Abstract:This paper is aimed at investigating the damage and remaining life of a whole HP-Nb hydrogen reformer tube serviced for 12 years. The damage...
407
Authors: Wei Ping Lin, Ya Jun Fan, Zhan Ling Zhang, Jie Wu Zhu, Yong Ning Liu
Abstract:A ultrahigh carbon steels (UHCS) containing 1.6 wt pct carbon was studied. Through spheroidizing process by divorced-eutectoid...
907
Authors: X.M. Wu, G.P. Zhang, J.Q. Zhang, W.G. Chen
Abstract:Microstructures of long-term serviced F12 steel exposed at 545 °C have been investigated by electron microscopes. The hardness of the...
295
Authors: Grzegorz Golański
Abstract:The paper presents results of research on the influence of ageing on the microstructure and mechanical properties of T24 steel. The examined...
56